Ferree, Clarence Errol, Rand, Gertrude, b.1886 · New York, etc. · leaf 45
the general illumination was held scribed in the articles referred to. constant at 30.5 foot candles horizontal The fields are shown in Figs. 1-5. component, for the spectrum colors At intensities A and B (Figs. 1 and and 130 foot candles for the pigment pa- 3), it will be noted that the limits for… … Fig. 6. — Fields taken under 51 foot candles of light, Fig. 7. — Fields taken under 17 foot candles ot light. an illumination equal to the daylight falling on an illumination equal to the daylight at the fixa- the perimeter at the fixation point when facing a tion point, on the same day at 2:30 p.…
Ophthalmology · Vision · Color vision
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
